Honeywell 7800 Series Product Data page 33

7800 SERIESS7800A2142 4-Line LCD Keyboard Display Module
• 4800 bps
• 9600 bps
• 19200 bps
• 38400 bps
• 57600 bps
• 115200 bps
The current baud rate setting is displayed when the page is initially entered.
Fig. 43. Modbus baud rate setup
The up and down arrow buttons are used to scroll through the speed choices on the edit
line. The right and left arrow buttons are used to tab to the save commands, "Yes" and
"No". When the input focus is on the save commands the up and down arrow buttons scroll
between "Yes" and "No". When the speed is set to the value desired the "Yes" command is
selected and the OK button is pressed to commit the change. If the user decides not to save
the displayed speed, the "No" command is selected and the OK button is pressed. In both
save command cases control returns back to the Modbus setup menu.
The Modbus parity can be edited by selecting the "Parity" line and pressing the right arrow
or OK button (see Fig. 44). The Modbus interface can be configured for one of the following
parity types:
• Even parity
• Odd parity
• No parity (None)
The current parity setting is displayed initially when the page is entered.
Fig. 44. Modbus parity setup
The up and down arrow buttons are used to scroll through the parity choices on the edit
line. The right and left arrow buttons are used to tab to the save commands, "Yes" and
"No". When the input focus is on the save commands the up and down arrow buttons
scroll between "Yes" and "No". When the parity choice is set to the value desired the "Yes"
command is selected and the OK button is pressed to commit the change. If the user
decides not to save the displayed parity setting, the "No" command is selected and the OK
button is pressed. In both save command cases the control returns back to the Modbus
setup menu.
The Endian data order for 32-bit registers in the Modbus interface (designated by U32
in Format column of Table 16) can be specified by selecting the "Endian order" line and
pressing the right arrow or OK button (see Fig. 45).
Fig. 45. Modbus Endian order setup
The data order can be set to "Big-Endian" or "Little-Endian". A Big-Endian setting is used
when the Modbus response provides the 32-bit data in the following order:
33 32-00110-07